Note: We might also have expressed the critical value as a z score. Because the sample size is fairly large, a z score analysis produces a similar result-a critical value equal to 2.58. 1  Compute margin of error (ME): ME = critical value * standard error = 2.61 * 0.82 = 2.1. 2  Specify the confidence interval.3  margin of error.he Variability of the Sample Mean. To construct a confidence interval for a sample mean, we need to know the variability of the sample mean. This means we need to know how to compute the standard deviation or the standard error of the sampling distribution.
Search form. 401(k) and IRA Required Minimum Distribution Calculator. Per IRS regulations, after reaching age 70Â½, you are generally required to start withdrawing money from a traditional 401(k) or IRA. Use this calculator to approximate your required minimum distribution based on your age and the value of your accounts.
BREAKING DOWN 'Required Minimum Distribution-RMD'. These required minimum distributions are determined by dividing the prior year-end fair market value of the retirement account by the applicable distribution period or life expectancy.